!* $Id$ !******************************************************************** ! Material subroutine for BVP solution using spectral method ! ! written by P. Eisenlohr, ! F. Roters, ! L. Hantcherli, ! W.A. Counts ! D.D. Tjahjanto ! C. Kords ! M. Diehl ! R. Lebensohn ! ! MPI fuer Eisenforschung, Duesseldorf ! !******************************************************************** ! Usage: ! - start program with mpie_spectral PathToMeshFile/NameOfMesh.mesh ! PathToLoadFile/NameOfLoadFile.load ! - PathToLoadFile will be the working directory ! - make sure the file "material.config" exists in the working ! directory !******************************************************************** program mpie_spectral !******************************************************************** use mpie_interface use prec, only: pInt, pReal use IO use math use CPFEM, only: CPFEM_general implicit none include 'fftw3.f' !header file for fftw3 (declaring variables). Library file is also needed !variables to read in from loadcase and mesh file real(pReal), dimension(9) :: valuevector ! stores information temporarily from loadcase file integer(pInt), parameter :: maxNchunksInput = 24 ! 4 identifiers, 18 values for the matrices and 2 scalars integer(pInt), dimension (1+maxNchunksInput*2) :: posInput integer(pInt), parameter :: maxNchunksMesh = 7 ! 4 identifiers, 3 values integer(pInt), dimension (1+2*maxNchunksMesh) :: posMesh integer(pInt) unit, N_l, N_s, N_t, N_n ! numbers of identifiers logical gotResolution,gotDimension,gotHomogenization logical, dimension(9) :: bc_maskvector character(len=1024) path, line ! variables storing information from loadcase file integer(pInt) N_Loadcases, steps integer(pInt), dimension(:), allocatable :: bc_steps ! number of steps real(pReal) timeinc real(pReal), dimension (:,:,:), allocatable :: bc_velocityGrad, & bc_stress ! velocity gradient and stress BC real(pReal), dimension(:), allocatable :: bc_timeIncrement ! length of increment logical, dimension(:,:,:,:), allocatable :: bc_mask ! mask of boundary conditions ! variables storing information from mesh file integer(pInt) homog, prodnn real(pReal) wgt integer(pInt), dimension(3) :: resolution real(pReal), dimension(3) :: meshdimension ! stress etc. real(pReal), dimension(6) :: cstress ! cauchy stress in Mandel notation real(pReal), dimension(3,3) :: pstress ! Piola-Kirchhoff stress in Matrix notation real(pReal), dimension(3,3,3,3) :: dPdF, c0, s0 ! ??, reference stiffnes, (reference stiffness)^-1 real(pReal), dimension(6,6) :: dsde, s066 real(pReal), dimension(3,3) :: defgradmacro real(pReal), dimension(3,3) :: cstress_av, defgrad_av, temp33_Real real(pReal), dimension(:,:,:,:,:), allocatable :: cstress_field, defgrad, defgradold, ddefgrad ! variables storing information for spectral method complex(pReal), dimension(:,:,:,:,:), allocatable :: workfft complex(pReal), dimension(3,3) :: temp33_Complex real(pReal), dimension(:,:,:,:,:,:,:), allocatable :: gamma_hat real(pReal), dimension(:,:,:,:,:), allocatable :: xknormdyad real(pReal), dimension(3) :: xk integer(pInt), dimension(3) :: k_s integer*8, dimension(2,3,3) :: plan_fft ! convergency etc. logical errmatinv integer(pInt) itmax, ierr real(pReal) error, err_stress_av, err_stress_max, err_strain_av, err_strain_max real(pReal), dimension(3,3) :: strain_err, cstress_err ! loop variables etc. integer(pInt) i, j, k, l, m, n, p integer(pInt) loadcase, ielem, iter, calcmode real(pReal) guessmode ! flip-flop to guess defgrad fluctuation field evolution real(pReal) temperature ! not used, but needed !gmsh output character(len=1024) :: nriter character(len=1024) :: nrstep !gmsh output !Initializing bc_maskvector = '' unit = 234_pInt N_l = 0_pInt N_s = 0_pInt N_t = 0_pInt N_n = 0_pInt cstress_err = .0_pReal; strain_err = .0_pReal cstress = .0_pReal dsde = .0_pReal resolution = 1_pInt; meshdimension = .0_pReal error = 0.001_pReal itmax = 50_pInt temperature = 300.0_pReal gotResolution =.false.; gotDimension =.false.; gotHomogenization = .false. if (IargC() < 2) call IO_error(102) ! check for correct number of arguments given ! Reading the loadcase file and assign variables path = getLoadcaseName() print*,'Loadcase: ',trim(path) print*,'Workingdir: ',trim(getSolverWorkingDirectoryName()) if (.not. IO_open_file(unit,path)) call IO_error(45,ext_msg = path) rewind(unit) do read(unit,'(a1024)',END = 101) line if (IO_isBlank(line)) cycle ! skip empty lines posInput = IO_stringPos(line,maxNchunksInput) do i = 1, maxNchunksInput, 1 select case (IO_lc(IO_stringValue(line,posInput,i))) case('l','velocitygrad') N_l = N_l+1 case('s','stress') N_s = N_s+1 case('t','time','delta') N_t = N_t+1 case('n','incs','increments','steps') N_n = N_n+1 end select enddo ! count all identifiers to allocate memory and do sanity check if ((N_l /= N_s).or.(N_s /= N_t).or.(N_t /= N_n)) & ! sanity check call IO_error(46,ext_msg = path) ! error message for incomplete input file enddo ! allocate memory depending on lines in input file 101 N_Loadcases = N_l allocate (bc_velocityGrad(3,3,N_Loadcases)); bc_velocityGrad = 0.0_pReal allocate (bc_stress(3,3,N_Loadcases)); bc_stress = 0.0_pReal allocate (bc_mask(3,3,2,N_Loadcases)); bc_mask = .false. allocate (bc_timeIncrement(N_Loadcases)); bc_timeIncrement = 0.0_pReal allocate (bc_steps(N_Loadcases)); bc_steps = 0_pInt rewind(unit) i = 0_pInt do read(unit,'(a1024)',END = 200) line if (IO_isBlank(line)) cycle ! skip empty lines i = i + 1 posInput = IO_stringPos(line,maxNchunksInput) do j = 1,maxNchunksInput,2 select case (IO_lc(IO_stringValue(line,posInput,j))) case('l','velocitygrad') valuevector = 0.0_pReal forall (k = 1:9) bc_maskvector(k) = IO_stringValue(line,posInput,j+k) /= '#' do k = 1,9 if (bc_maskvector(k)) valuevector(k) = IO_floatValue(line,posInput,j+k) ! assign values for the velocity gradient matrix enddo bc_mask(:,:,1,i) = reshape(bc_maskvector,(/3,3/)) bc_velocityGrad(:,:,i) = reshape(valuevector,(/3,3/)) case('s','stress') valuevector = 0.0_pReal forall (k = 1:9) bc_maskvector(k) = IO_stringValue(line,posInput,j+k) /= '#' do k = 1,9 if (bc_maskvector(k)) valuevector(k) = IO_floatValue(line,posInput,j+k) ! assign values for the bc_stress matrix enddo bc_mask(:,:,2,i) = reshape(bc_maskvector,(/3,3/)) bc_stress(:,:,i) = reshape(valuevector,(/3,3/)) case('t','time','delta') ! increment time bc_timeIncrement(i) = IO_floatValue(line,posInput,j+1) case('n','incs','increments','steps') ! bc_steps bc_steps(i) = IO_intValue(line,posInput,j+1) end select enddo; enddo 200 close(unit) ! consistency checks do i = 1, N_Loadcases if (any(bc_mask(:,:,1,i) == bc_mask(:,:,2,i))) & call IO_error(47,i) ! bc_mask consistency if (any(math_transpose3x3(bc_stress(:,:,i)) + bc_stress(:,:,i) /= 2.0_pReal * bc_stress(:,:,i))) & call IO_error(48,i) ! bc_stress symmetry print '(a,/,3(3(f12.6,x)/))','L',bc_velocityGrad(:,:,i) print '(a,/,3(3(f12.6,x)/))','bc_stress',bc_stress(:,:,i) print '(a,/,3(3(l,x)/))','bc_mask for velocitygrad',bc_mask(:,:,1,i) print '(a,/,3(3(l,x)/))','bc_mask for stress',bc_mask(:,:,2,i) print *,'time',bc_timeIncrement(i) print *,'incs',bc_steps(i) print *, '' enddo !read header of mesh file to get the information needed before the complete mesh file is intepretated by mesh.f90 path = getSolverJobName() print*,'JobName: ',trim(path) if (.not. IO_open_file(unit,trim(path)//InputFileExtension)) call IO_error(101,ext_msg = path) rewind(unit) do read(unit,'(a1024)',END = 100) line if (IO_isBlank(line)) cycle ! skip empty lines posMesh = IO_stringPos(line,maxNchunksMesh) select case ( IO_lc(IO_StringValue(line,posMesh,1)) ) case ('dimension') gotDimension = .true. do i = 2,6,2 select case (IO_lc(IO_stringValue(line,posMesh,i))) case('x') meshdimension(1) = IO_floatValue(line,posMesh,i+1) case('y') meshdimension(2) = IO_floatValue(line,posMesh,i+1) case('z') meshdimension(3) = IO_floatValue(line,posMesh,i+1) end select enddo case ('homogenization') gotHomogenization = .true. homog = IO_intValue(line,posMesh,2) case ('resolution') gotResolution = .true. do i = 2,6,2 select case (IO_lc(IO_stringValue(line,posMesh,i))) case('a') resolution(1) = 2**IO_intValue(line,posMesh,i+1) case('b') resolution(2) = 2**IO_intValue(line,posMesh,i+1) case('c') resolution(3) = 2**IO_intValue(line,posMesh,i+1) end select enddo end select if (gotDimension .and. gotHomogenization .and. gotResolution) exit enddo 100 close(unit) print '(a,/,i3,i3,i3)','resolution a b c', resolution print '(a,/,f6.2,f6.2,f6.2)','dimension x y z', meshdimension print *,'homogenization',homog print *, '' allocate (workfft(resolution(1)/2+1,resolution(2),resolution(3),3,3)); workfft = .0_pReal allocate (gamma_hat(resolution(1)/2+1,resolution(2),resolution(3),3,3,3,3)); gamma_hat = .0_pReal allocate (xknormdyad(resolution(1)/2+1,resolution(2),resolution(3),3,3)); xknormdyad = .0_pReal allocate (cstress_field(resolution(1),resolution(2),resolution(3),3,3)); cstress_field = .0_pReal allocate (defgrad(resolution(1),resolution(2),resolution(3),3,3)); defgrad = .0_pReal allocate (defgradold(resolution(1),resolution(2),resolution(3),3,3)); defgradold = .0_pReal allocate (ddefgrad(resolution(1),resolution(2),resolution(3),3,3)); ddefgrad = .0_pReal call dfftw_init_threads(ierr) call dfftw_plan_with_nthreads(4) do m = 1,3; do n = 1,3 call dfftw_plan_dft_r2c_3d(plan_fft(1,m,n),resolution(1),resolution(2),resolution(3),& cstress_field(:,:,:,m,n), workfft(:,:,:,m,n), FFTW_PATIENT, FFTW_DESTROY_INPUT) call dfftw_plan_dft_c2r_3d(plan_fft(2,m,n),resolution(1),resolution(2),resolution(3),& workfft(:,:,:,m,n), ddefgrad(:,:,:,m,n), FFTW_PATIENT) enddo; enddo prodnn = resolution(1)*resolution(2)*resolution(3) wgt = 1._pReal/real(prodnn, pReal) ielem = 0_pInt c0 = .0_pReal defgradmacro = math_I3 do k = 1, resolution(3); do j = 1, resolution(2); do i = 1, resolution(1) defgradold(i,j,k,:,:) = math_I3 !no deformation at the beginning defgrad(i,j,k,:,:) = math_I3 ielem = ielem +1 call CPFEM_general(2,math_I3,math_I3,temperature,0.0_pReal,ielem,1_pInt,cstress,dsde,pstress,dPdF) c0 = c0 + math_Mandel66to3333(dsde) enddo; enddo; enddo call math_invert(6,math_Mandel3333to66(c0),s066,i,errmatinv) !i is just a dummy variable if(errmatinv) call IO_error(45,ext_msg = "problem in c0 inversion") ! todo: change number and add message to io.f90 s0 = math_Mandel66to3333(s066)*real(prodnn, pReal) !calculation of xknormdyad (needed to calculate gamma_hat) do k = 1, resolution(3) k_s(3) = k-1 if(k > resolution(3)/2+1) k_s(3) = k_s(3)-resolution(3) xk(3) = .0_pReal if(resolution(3) > 1) xk(3) = real(k_s(3), pReal)/meshdimension(3) do j = 1, resolution(2) k_s(2) = j-1 if(j > resolution(2)/2+1) k_s(2) = k_s(2)-resolution(2) xk(2) = real(k_s(2), pReal)/meshdimension(2) do i = 1, resolution(1)/2+1 k_s(1) = i-1 xk(1) = real(k_s(1), pReal)/meshdimension(1) if (any(xk /= .0_pReal)) then do l = 1,3; do m = 1,3 xknormdyad(i,j,k, l,m) = xk(l)*xk(m)/(xk(1)**2+xk(2)**2+xk(3)**2) enddo; enddo endif enddo; enddo; enddo ! Initialization done open(539,file='stress-strain.out') !************************************************************* !Loop over loadcases defined in the loadcase file do loadcase = 1, N_Loadcases !************************************************************* timeinc = bc_timeIncrement(loadcase)/bc_steps(loadcase) guessmode = 0.0_pReal ! change of load case !************************************************************* ! loop oper steps defined in input file for current loadcase do steps = 1, bc_steps(loadcase) !************************************************************* write(*,*) '***************************************************' write(*,*) 'STEP = ',steps do k = 1, resolution(3); do j = 1, resolution(2); do i = 1, resolution(1) temp33_Real = defgrad(i,j,k,:,:) defgrad(i,j,k,:,:) = defgrad(i,j,k,:,:) + guessmode * (defgrad(i,j,k,:,:) - defgradold(i,j,k,:,:))& ! old fluctuations as guess for new step + (1.0_pReal-guessmode) * bc_velocityGrad(:,:,loadcase)*timeinc ! homogeneous fluctuations for new loadcase defgradold(i,j,k,:,:) = temp33_Real ! wind forward enddo; enddo; enddo defgradmacro = defgradmacro + bc_velocityGrad(:,:,loadcase)*timeinc !update macroscopic displacement gradient (stores the desired BCs of defgrad) guessmode = 1.0_pReal ! keep guessing along former trajectory calcmode = 1_pInt iter = 0_pInt err_stress_av = 2.*error; err_strain_av = 2.*error !************************************************************* ! convergency loop do while((iter <= itmax).and.((err_stress_av > error).or.(err_strain_av > error))) iter = iter+1 write(*,*) 'ITER = ',iter !************************************************************* err_strain_av = .0_pReal; err_stress_av = .0_pReal err_strain_max = .0_pReal; err_stress_max = .0_pReal cstress_av = .0_pReal; defgrad_av=.0_pReal write(*,*) 'UPDATE STRESS FIELD' ielem = 0_pInt do k = 1, resolution(3); do j = 1, resolution(2); do i = 1, resolution(1) ielem = ielem + 1 call CPFEM_general(3, defgradold(i,j,k,:,:), defgrad(i,j,k,:,:),& temperature,timeinc,ielem,1_pInt,& cstress,dsde, pstress, dPdF) enddo; enddo; enddo c0 = .0_pReal l = 0_pInt ielem = 0_pInt do k = 1, resolution(3); do j = 1, resolution(2); do i = 1, resolution(1) ielem = ielem + 1 call CPFEM_general(calcmode,& ! first element in first iteration retains calcMode 1, others get 2 (saves winding forward effort) defgradold(i,j,k,:,:), defgrad(i,j,k,:,:),& temperature,timeinc,ielem,1_pInt,& cstress,dsde, pstress, dPdF) calcmode = 2 c0 = c0 + math_Mandel66to3333(dsde) temp33_Real = math_Mandel6to33(cstress) do m = 1,3; do n = 1,3 ! calculate stress error if(abs(temp33_Real(m,n)) > 0.1_pReal * abs(cstress_err(m,n))) then ! only stress components larger than 10% are taking under consideration err_stress_av = err_stress_av + abs((cstress_field(i,j,k,m,n)-temp33_Real(m,n))/temp33_Real(m,n)) err_stress_max = max(err_stress_max, abs((cstress_field(i,j,k,m,n)-temp33_Real(m,n))/temp33_Real(m,n))) l=l+1 endif enddo; enddo cstress_field(i,j,k,:,:) = temp33_Real cstress_av = cstress_av + temp33_Real ! average stress enddo; enddo; enddo err_stress_av = err_stress_av/l ! do the weighting of the error cstress_av = cstress_av*wgt ! do the weighting of average stress cstress_err = cstress_av if(iter==1) then !update reference stiffness for gamma_hat c0 = c0 *wgt do k = 1, resolution(3); do j = 1, resolution(2); do i = 1, resolution(1)/2+1 temp33_Real = .0_pReal do l = 1,3; do m = 1,3; do n = 1,3; do p = 1,3 temp33_Real(l,m) = temp33_Real(l,m)+c0(l,n,m,p)*xknormdyad(i,j,k, n,p) enddo; enddo; enddo; enddo temp33_Real = math_inv3x3(temp33_Real) do l=1,3; do m=1,3; do n=1,3; do p=1,3 gamma_hat(i,j,k, l,m,n,p) = -temp33_Real(l,n)*xknormdyad(i,j,k, m,p) enddo; enddo; enddo; enddo enddo; enddo; enddo endif write(*,*) 'SPECTRAL METHOD TO GET CHANGE OF DEFORMATION GRADIENT FIELD' do m = 1,3; do n = 1,3 call dfftw_execute_dft_r2c(plan_fft(1,m,n), cstress_field(:,:,:,m,n),workfft(:,:,:,m,n)) enddo; enddo do k = 1, resolution(3); do j = 1, resolution(2); do i = 1, resolution(1)/2+1 temp33_Complex = .0_pReal do m = 1,3; do n = 1,3 temp33_Complex(m,n) = sum(gamma_hat(i,j,k,m,n,:,:) * workfft(i,j,k,:,:)) enddo; enddo workfft(i,j,k,:,:) = temp33_Complex(:,:) enddo; enddo; enddo do m = 1,3; do n = 1,3 call dfftw_execute_dft_c2r(plan_fft(2,m,n), workfft(:,:,:,m,n),ddefgrad(:,:,:,m,n)) enddo; enddo ddefgrad = ddefgrad * wgt defgrad = defgrad + ddefgrad l = 0_pInt do k = 1, resolution(3); do j = 1, resolution(2); do i = 1, resolution(1) defgrad_av(:,:) = defgrad_av(:,:) + defgrad(i,j,k,:,:) ! calculate average strain do m = 1,3; do n = 1,3 ! calculate strain error if(abs(defgrad(i,j,k,m,n)) > 0.1 * abs(strain_err(m,n))) then err_strain_av = err_strain_av + abs(real(ddefgrad(i,j,k,m,n), pReal)/defgrad(i,j,k,m,n)) err_strain_max = max(err_strain_max, abs(real(ddefgrad(i,j,k,m,n), pReal)/defgrad(i,j,k,m,n))) l=l+1 endif enddo; enddo enddo; enddo; enddo err_strain_av = err_strain_av/l ! weight by number of non-zero strain components defgrad_av = defgrad_av * wgt ! weight by number of points strain_err = defgrad_av do m = 1,3; do n = 1,3 if(bc_mask(m,n,1,loadcase)) then ! adjust defgrad to fulfill displacement BC (defgradmacro) defgrad(:,:,:,m,n) = defgrad(:,:,:,m,n) + (defgradmacro(m,n)-defgrad_av(m,n)) else ! adjust defgrad to fulfill stress BC defgrad(:,:,:,m,n) = defgrad(:,:,:,m,n) + sum( s0(m,n,:,:)*(bc_stress(:,:,loadcase)-cstress_av(:,:)), & mask = bc_mask(:,:,2,loadcase) ) endif enddo; enddo write(*,*) 'STRESS FIELD ERROR AV = ',err_stress_av write(*,*) 'STRAIN FIELD ERROR AV = ',err_strain_av write(*,*) 'STRESS FIELD ERROR MAX = ',err_stress_max write(*,*) 'STRAIN FIELD ERROR MAX = ',err_strain_max enddo ! end looping when convergency is achieved write(539,'(f12.6,a,f12.6)'),defgrad_av(3,3)-1,' ',cstress_av(3,3) write(*,*) 'U11 U22 U33' write(*,*) defgrad_av(1,1)-1,defgrad_av(2,2)-1,defgrad_av(3,3)-1 write(*,*) 'U11/U33' write(*,*) (defgrad_av(1,1)-1)/(defgrad_av(3,3)-1) write(*,*) 'S11 S22 S33' write(*,*) cstress_av(1,1),cstress_av(2,2),cstress_av(3,3) !gsmh output write(nriter, *) iter write(nrstep, *) steps nrstep='defgrad'//trim(adjustl(nrstep))//'-'//trim(adjustl(nriter))//'_cpfem.msh' open(589,file=nrstep) write(589, '(A, /, A, /, A, /, A, /, I10)'), '$MeshFormat', '2.1 0 8', '$EndMeshFormat', '$Nodes', prodnn do i = 1, prodnn write(589, '(I10, I10, I10, I10)'), i, mod((i-1), resolution(1)) +1, mod(((i-1)/resolution(1)),& resolution(2)) +1, mod(((i-1)/(resolution(1)*resolution(2))), resolution(3)) +1 enddo write(589, '(A, /, A, /, I10)'), '$EndNodes', '$Elements', prodnn do i = 1, prodnn write(589, '(I10, A, I10)'), i, ' 15 2 1 2', i enddo write(589, '(A)'), '$EndElements' write(589, '(A, /, A, /, A, /, A, /, A, /, A, /, A, /, A, /, I10)'), '$NodeData', '1',& '"'//trim(adjustl(nrstep))//'"', '1','0.0', '3', '0', '9', prodnn ielem = 0_pInt do k = 1, resolution(3); do j = 1, resolution(2); do i = 1, resolution(1) ielem = ielem + 1 write(589, '(i10,f16.8,tr2,f16.8,tr2,f16.8,tr2,f16.8,tr2,f16.8,tr2,f16.8,& tr2,f16.8,tr2,f16.8,tr2,f16.8,tr2)'), ielem, defgrad(i,j,k,:,:) enddo; enddo; enddo write(589, *), '$EndNodeData' close(589) write(nriter, *) iter write(nrstep, *) steps nrstep = 'stress'//trim(adjustl(nrstep))//'-'//trim(adjustl(nriter))//'_cpfem.msh' open(589,file = nrstep) write(589, '(A, /, A, /, A, /, A, /, I10)'), '$MeshFormat', '2.1 0 8', '$EndMeshFormat', '$Nodes', prodnn do i = 1, prodnn write(589, '(I10, I10, I10, I10)'), i, mod((i-1), resolution(1)) +1, mod(((i-1)/resolution(1)),& resolution(2)) +1, mod(((i-1)/(resolution(1)*resolution(2))), resolution(3)) +1 enddo write(589, '(A, /, A, /, I10)'), '$EndNodes', '$Elements', prodnn do i = 1, prodnn write(589, '(I10, A, I10)'), i, ' 15 2 1 2', i enddo write(589, '(A)'), '$EndElements' write(589, '(A, /, A, /, A, /, A, /, A, /, A, /, A, /, A, /, I10)'), '$NodeData', '1',& '"'//trim(adjustl(nrstep))//'"', '1','0.0', '3', '0', '9', prodnn ielem = 0_pInt do k = 1, resolution(3); do j = 1, resolution(2); do i = 1, resolution(1) ielem = ielem + 1 write(589, '(i10,f16.8,tr2,f16.8,tr2,f16.8,tr2,f16.8,tr2,f16.8,tr2,f16.8,& tr2,f16.8,tr2,f16.8,tr2,f16.8,tr2)'), ielem, cstress_field(i,j,k,:,:) enddo; enddo; enddo write(589, *), '$EndNodeData' close(589) !end gmsh enddo ! end looping over steps in current loadcase enddo ! end looping over loadcases close(539) do i=1,2; do m = 1,3; do n = 1,3 call dfftw_destroy_plan(plan_fft(i,m,n)) enddo; enddo; enddo end program mpie_spectral !******************************************************************** ! quit subroutine to satisfy IO_error ! !******************************************************************** subroutine quit(id) use prec implicit none integer(pInt) id stop end subroutine